65324513280 has 192 divisors, whose sum is σ = 225064738080. Its totient is φ = 16079781888.

The previous prime is 65324513269. The next prime is 65324513291. The reversal of 65324513280 is 8231542356.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (65324513269) and next prime (65324513291).

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-3 number, since 3×65324513280³ (a number of 33 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317574 + ... + 481146.

Almost surely, 2^65324513280 is an apocalyptic number.

65324513280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65324513280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112532369040).

65324513280 is an abundant number, since it is smaller than the sum of its proper divisors (159740224800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65324513280 is a wasteful number, since it uses less digits than its factorization.

65324513280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163616 (or 163596 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 65324513280 in words is "sixty-five billion, three hundred twenty-four million, five hundred thirteen thousand, two hundred eighty".